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qemu/hw/intc/xive2.c
Cédric Le Goater 95d729e2bc ppc/pnv: add XIVE Gen2 TIMA support 
Only the CAM line updates done by the hypervisor are specific to
POWER10. Instead of duplicating the TM ops table, we handle these
commands locally under the PowerNV XIVE2 model.

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-03-02 06:51:39 +01:00

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/*
* QEMU PowerPC XIVE2 interrupt controller model (POWER10)
*
* Copyright (c) 2019-2022, IBM Corporation..
*
* This code is licensed under the GPL version 2 or later. See the
* COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "qapi/error.h"
#include "target/ppc/cpu.h"
#include "sysemu/cpus.h"
#include "sysemu/dma.h"
#include "hw/qdev-properties.h"
#include "monitor/monitor.h"
#include "hw/ppc/xive.h"
#include "hw/ppc/xive2.h"
#include "hw/ppc/xive2_regs.h"
void xive2_eas_pic_print_info(Xive2Eas *eas, uint32_t lisn, Monitor *mon)
{
if (!xive2_eas_is_valid(eas)) {
return;
}
monitor_printf(mon, " %08x %s end:%02x/%04x data:%08x\n",
lisn, xive2_eas_is_masked(eas) ? "M" : " ",
(uint8_t) xive_get_field64(EAS2_END_BLOCK, eas->w),
(uint32_t) xive_get_field64(EAS2_END_INDEX, eas->w),
(uint32_t) xive_get_field64(EAS2_END_DATA, eas->w));
}
void xive2_end_queue_pic_print_info(Xive2End *end, uint32_t width,
Monitor *mon)
{
uint64_t qaddr_base = xive2_end_qaddr(end);
uint32_t qsize = xive_get_field32(END2_W3_QSIZE, end->w3);
uint32_t qindex = xive_get_field32(END2_W1_PAGE_OFF, end->w1);
uint32_t qentries = 1 << (qsize + 10);
int i;
/*
* print out the [ (qindex - (width - 1)) .. (qindex + 1)] window
*/
monitor_printf(mon, " [ ");
qindex = (qindex - (width - 1)) & (qentries - 1);
for (i = 0; i < width; i++) {
uint64_t qaddr = qaddr_base + (qindex << 2);
uint32_t qdata = -1;
if (dma_memory_read(&address_space_memory, qaddr, &qdata,
sizeof(qdata), MEMTXATTRS_UNSPECIFIED)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to read EQ @0x%"
HWADDR_PRIx "\n", qaddr);
return;
}
monitor_printf(mon, "%s%08x ", i == width - 1 ? "^" : "",
be32_to_cpu(qdata));
qindex = (qindex + 1) & (qentries - 1);
}
monitor_printf(mon, "]");
}
void xive2_end_pic_print_info(Xive2End *end, uint32_t end_idx, Monitor *mon)
{
uint64_t qaddr_base = xive2_end_qaddr(end);
uint32_t qindex = xive_get_field32(END2_W1_PAGE_OFF, end->w1);
uint32_t qgen = xive_get_field32(END2_W1_GENERATION, end->w1);
uint32_t qsize = xive_get_field32(END2_W3_QSIZE, end->w3);
uint32_t qentries = 1 << (qsize + 10);
uint32_t nvp_blk = xive_get_field32(END2_W6_VP_BLOCK, end->w6);
uint32_t nvp_idx = xive_get_field32(END2_W6_VP_OFFSET, end->w6);
uint8_t priority = xive_get_field32(END2_W7_F0_PRIORITY, end->w7);
uint8_t pq;
if (!xive2_end_is_valid(end)) {
return;
}
pq = xive_get_field32(END2_W1_ESn, end->w1);
monitor_printf(mon,
" %08x %c%c %c%c%c%c%c%c%c%c%c%c prio:%d nvp:%02x/%04x",
end_idx,
pq & XIVE_ESB_VAL_P ? 'P' : '-',
pq & XIVE_ESB_VAL_Q ? 'Q' : '-',
xive2_end_is_valid(end) ? 'v' : '-',
xive2_end_is_enqueue(end) ? 'q' : '-',
xive2_end_is_notify(end) ? 'n' : '-',
xive2_end_is_backlog(end) ? 'b' : '-',
xive2_end_is_escalate(end) ? 'e' : '-',
xive2_end_is_escalate_end(end) ? 'N' : '-',
xive2_end_is_uncond_escalation(end) ? 'u' : '-',
xive2_end_is_silent_escalation(end) ? 's' : '-',
xive2_end_is_firmware1(end) ? 'f' : '-',
xive2_end_is_firmware2(end) ? 'F' : '-',
priority, nvp_blk, nvp_idx);
if (qaddr_base) {
monitor_printf(mon, " eq:@%08"PRIx64"% 6d/%5d ^%d",
qaddr_base, qindex, qentries, qgen);
xive2_end_queue_pic_print_info(end, 6, mon);
}
monitor_printf(mon, "\n");
}
void xive2_end_eas_pic_print_info(Xive2End *end, uint32_t end_idx,
Monitor *mon)
{
Xive2Eas *eas = (Xive2Eas *) &end->w4;
uint8_t pq;
if (!xive2_end_is_escalate(end)) {
return;
}
pq = xive_get_field32(END2_W1_ESe, end->w1);
monitor_printf(mon, " %08x %c%c %c%c end:%02x/%04x data:%08x\n",
end_idx,
pq & XIVE_ESB_VAL_P ? 'P' : '-',
pq & XIVE_ESB_VAL_Q ? 'Q' : '-',
xive2_eas_is_valid(eas) ? 'v' : ' ',
xive2_eas_is_masked(eas) ? 'M' : ' ',
(uint8_t) xive_get_field64(EAS2_END_BLOCK, eas->w),
(uint32_t) xive_get_field64(EAS2_END_INDEX, eas->w),
(uint32_t) xive_get_field64(EAS2_END_DATA, eas->w));
}
static void xive2_end_enqueue(Xive2End *end, uint32_t data)
{
uint64_t qaddr_base = xive2_end_qaddr(end);
uint32_t qsize = xive_get_field32(END2_W3_QSIZE, end->w3);
uint32_t qindex = xive_get_field32(END2_W1_PAGE_OFF, end->w1);
uint32_t qgen = xive_get_field32(END2_W1_GENERATION, end->w1);
uint64_t qaddr = qaddr_base + (qindex << 2);
uint32_t qdata = cpu_to_be32((qgen << 31) | (data & 0x7fffffff));
uint32_t qentries = 1 << (qsize + 10);
if (dma_memory_write(&address_space_memory, qaddr, &qdata, sizeof(qdata),
MEMTXATTRS_UNSPECIFIED)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to write END data @0x%"
HWADDR_PRIx "\n", qaddr);
return;
}
qindex = (qindex + 1) & (qentries - 1);
if (qindex == 0) {
qgen ^= 1;
end->w1 = xive_set_field32(END2_W1_GENERATION, end->w1, qgen);
/* TODO(PowerNV): reset GF bit on a cache watch operation */
end->w1 = xive_set_field32(END2_W1_GEN_FLIPPED, end->w1, qgen);
}
end->w1 = xive_set_field32(END2_W1_PAGE_OFF, end->w1, qindex);
}
/*
* XIVE Thread Interrupt Management Area (TIMA) - Gen2 mode
*/
static void xive2_os_cam_decode(uint32_t cam, uint8_t *nvp_blk,
uint32_t *nvp_idx, bool *vo)
{
*nvp_blk = xive2_nvp_blk(cam);
*nvp_idx = xive2_nvp_idx(cam);
*vo = !!(cam & TM2_QW1W2_VO);
}
uint64_t xive2_tm_pull_os_ctx(XivePresenter *xptr, XiveTCTX *tctx,
hwaddr offset, unsigned size)
{
uint32_t qw1w2 = xive_tctx_word2(&tctx->regs[TM_QW1_OS]);
uint32_t qw1w2_new;
uint32_t cam = be32_to_cpu(qw1w2);
uint8_t nvp_blk;
uint32_t nvp_idx;
bool vo;
xive2_os_cam_decode(cam, &nvp_blk, &nvp_idx, &vo);
if (!vo) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: pulling invalid NVP %x/%x !?\n",
nvp_blk, nvp_idx);
}
/* Invalidate CAM line */
qw1w2_new = xive_set_field32(TM2_QW1W2_VO, qw1w2, 0);
memcpy(&tctx->regs[TM_QW1_OS + TM_WORD2], &qw1w2_new, 4);
return qw1w2;
}
static void xive2_tctx_need_resend(Xive2Router *xrtr, XiveTCTX *tctx,
uint8_t nvp_blk, uint32_t nvp_idx)
{
Xive2Nvp nvp;
uint8_t ipb;
uint8_t cppr = 0;
/*
* Grab the associated thread interrupt context registers in the
* associated NVP
*/
if (xive2_router_get_nvp(xrtr, nvp_blk, nvp_idx, &nvp)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No NVP %x/%x\n",
nvp_blk, nvp_idx);
return;
}
if (!xive2_nvp_is_valid(&nvp)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid NVP %x/%x\n",
nvp_blk, nvp_idx);
return;
}
ipb = xive_get_field32(NVP2_W2_IPB, nvp.w2);
if (ipb) {
nvp.w2 = xive_set_field32(NVP2_W2_IPB, nvp.w2, 0);
xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, &nvp, 2);
}
/* An IPB or CPPR change can trigger a resend */
if (ipb || cppr) {
xive_tctx_ipb_update(tctx, TM_QW1_OS, ipb);
}
}
/*
* Updating the OS CAM line can trigger a resend of interrupt
*/
void xive2_tm_push_os_ctx(XivePresenter *xptr, XiveTCTX *tctx,
hwaddr offset, uint64_t value, unsigned size)
{
uint32_t cam = value;
uint32_t qw1w2 = cpu_to_be32(cam);
uint8_t nvp_blk;
uint32_t nvp_idx;
bool vo;
xive2_os_cam_decode(cam, &nvp_blk, &nvp_idx, &vo);
/* First update the thead context */
memcpy(&tctx->regs[TM_QW1_OS + TM_WORD2], &qw1w2, 4);
/* Check the interrupt pending bits */
if (vo) {
xive2_tctx_need_resend(XIVE2_ROUTER(xptr), tctx, nvp_blk, nvp_idx);
}
}
/*
* XIVE Router (aka. Virtualization Controller or IVRE)
*/
int xive2_router_get_eas(Xive2Router *xrtr, uint8_t eas_blk, uint32_t eas_idx,
Xive2Eas *eas)
{
Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr);
return xrc->get_eas(xrtr, eas_blk, eas_idx, eas);
}
static
int xive2_router_get_pq(Xive2Router *xrtr, uint8_t eas_blk, uint32_t eas_idx,
uint8_t *pq)
{
Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr);
return xrc->get_pq(xrtr, eas_blk, eas_idx, pq);
}
static
int xive2_router_set_pq(Xive2Router *xrtr, uint8_t eas_blk, uint32_t eas_idx,
uint8_t *pq)
{
Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr);
return xrc->set_pq(xrtr, eas_blk, eas_idx, pq);
}
int xive2_router_get_end(Xive2Router *xrtr, uint8_t end_blk, uint32_t end_idx,
Xive2End *end)
{
Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr);
return xrc->get_end(xrtr, end_blk, end_idx, end);
}
int xive2_router_write_end(Xive2Router *xrtr, uint8_t end_blk, uint32_t end_idx,
Xive2End *end, uint8_t word_number)
{
Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr);
return xrc->write_end(xrtr, end_blk, end_idx, end, word_number);
}
int xive2_router_get_nvp(Xive2Router *xrtr, uint8_t nvp_blk, uint32_t nvp_idx,
Xive2Nvp *nvp)
{
Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr);
return xrc->get_nvp(xrtr, nvp_blk, nvp_idx, nvp);
}
int xive2_router_write_nvp(Xive2Router *xrtr, uint8_t nvp_blk, uint32_t nvp_idx,
Xive2Nvp *nvp, uint8_t word_number)
{
Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr);
return xrc->write_nvp(xrtr, nvp_blk, nvp_idx, nvp, word_number);
}
static int xive2_router_get_block_id(Xive2Router *xrtr)
{
Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr);
return xrc->get_block_id(xrtr);
}
/*
* Encode the HW CAM line with 7bit or 8bit thread id. The thread id
* width and block id width is configurable at the IC level.
*
* chipid << 24 | 0000 0000 0000 0000 1 threadid (7Bit)
* chipid << 24 | 0000 0000 0000 0001 threadid (8Bit)
*/
static uint32_t xive2_tctx_hw_cam_line(XivePresenter *xptr, XiveTCTX *tctx)
{
Xive2Router *xrtr = XIVE2_ROUTER(xptr);
CPUPPCState *env = &POWERPC_CPU(tctx->cs)->env;
uint32_t pir = env->spr_cb[SPR_PIR].default_value;
uint8_t blk = xive2_router_get_block_id(xrtr);
uint8_t tid_shift = 7;
uint8_t tid_mask = (1 << tid_shift) - 1;
return xive2_nvp_cam_line(blk, 1 << tid_shift | (pir & tid_mask));
}
/*
* The thread context register words are in big-endian format.
*/
int xive2_presenter_tctx_match(XivePresenter *xptr, XiveTCTX *tctx,
uint8_t format,
uint8_t nvt_blk, uint32_t nvt_idx,
bool cam_ignore, uint32_t logic_serv)
{
uint32_t cam = xive2_nvp_cam_line(nvt_blk, nvt_idx);
uint32_t qw3w2 = xive_tctx_word2(&tctx->regs[TM_QW3_HV_PHYS]);
uint32_t qw2w2 = xive_tctx_word2(&tctx->regs[TM_QW2_HV_POOL]);
uint32_t qw1w2 = xive_tctx_word2(&tctx->regs[TM_QW1_OS]);
uint32_t qw0w2 = xive_tctx_word2(&tctx->regs[TM_QW0_USER]);
/*
* TODO (PowerNV): ignore mode. The low order bits of the NVT
* identifier are ignored in the "CAM" match.
*/
if (format == 0) {
if (cam_ignore == true) {
/*
* F=0 & i=1: Logical server notification (bits ignored at
* the end of the NVT identifier)
*/
qemu_log_mask(LOG_UNIMP, "XIVE: no support for LS NVT %x/%x\n",
nvt_blk, nvt_idx);
return -1;
}
/* F=0 & i=0: Specific NVT notification */
/* PHYS ring */
if ((be32_to_cpu(qw3w2) & TM2_QW3W2_VT) &&
cam == xive2_tctx_hw_cam_line(xptr, tctx)) {
return TM_QW3_HV_PHYS;
}
/* HV POOL ring */
if ((be32_to_cpu(qw2w2) & TM2_QW2W2_VP) &&
cam == xive_get_field32(TM2_QW2W2_POOL_CAM, qw2w2)) {
return TM_QW2_HV_POOL;
}
/* OS ring */
if ((be32_to_cpu(qw1w2) & TM2_QW1W2_VO) &&
cam == xive_get_field32(TM2_QW1W2_OS_CAM, qw1w2)) {
return TM_QW1_OS;
}
} else {
/* F=1 : User level Event-Based Branch (EBB) notification */
/* USER ring */
if ((be32_to_cpu(qw1w2) & TM2_QW1W2_VO) &&
(cam == xive_get_field32(TM2_QW1W2_OS_CAM, qw1w2)) &&
(be32_to_cpu(qw0w2) & TM2_QW0W2_VU) &&
(logic_serv == xive_get_field32(TM2_QW0W2_LOGIC_SERV, qw0w2))) {
return TM_QW0_USER;
}
}
return -1;
}
static void xive2_router_realize(DeviceState *dev, Error **errp)
{
Xive2Router *xrtr = XIVE2_ROUTER(dev);
assert(xrtr->xfb);
}
/*
* Notification using the END ESe/ESn bit (Event State Buffer for
* escalation and notification). Profide futher coalescing in the
* Router.
*/
static bool xive2_router_end_es_notify(Xive2Router *xrtr, uint8_t end_blk,
uint32_t end_idx, Xive2End *end,
uint32_t end_esmask)
{
uint8_t pq = xive_get_field32(end_esmask, end->w1);
bool notify = xive_esb_trigger(&pq);
if (pq != xive_get_field32(end_esmask, end->w1)) {
end->w1 = xive_set_field32(end_esmask, end->w1, pq);
xive2_router_write_end(xrtr, end_blk, end_idx, end, 1);
}
/* ESe/n[Q]=1 : end of notification */
return notify;
}
/*
* An END trigger can come from an event trigger (IPI or HW) or from
* another chip. We don't model the PowerBus but the END trigger
* message has the same parameters than in the function below.
*/
static void xive2_router_end_notify(Xive2Router *xrtr, uint8_t end_blk,
uint32_t end_idx, uint32_t end_data)
{
Xive2End end;
uint8_t priority;
uint8_t format;
bool found;
Xive2Nvp nvp;
uint8_t nvp_blk;
uint32_t nvp_idx;
/* END cache lookup */
if (xive2_router_get_end(xrtr, end_blk, end_idx, &end)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk,
end_idx);
return;
}
if (!xive2_end_is_valid(&end)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x is invalid\n",
end_blk, end_idx);
return;
}
if (xive2_end_is_enqueue(&end)) {
xive2_end_enqueue(&end, end_data);
/* Enqueuing event data modifies the EQ toggle and index */
xive2_router_write_end(xrtr, end_blk, end_idx, &end, 1);
}
/*
* When the END is silent, we skip the notification part.
*/
if (xive2_end_is_silent_escalation(&end)) {
goto do_escalation;
}
/*
* The W7 format depends on the F bit in W6. It defines the type
* of the notification :
*
* F=0 : single or multiple NVP notification
* F=1 : User level Event-Based Branch (EBB) notification, no
* priority
*/
format = xive_get_field32(END2_W6_FORMAT_BIT, end.w6);
priority = xive_get_field32(END2_W7_F0_PRIORITY, end.w7);
/* The END is masked */
if (format == 0 && priority == 0xff) {
return;
}
/*
* Check the END ESn (Event State Buffer for notification) for
* even futher coalescing in the Router
*/
if (!xive2_end_is_notify(&end)) {
/* ESn[Q]=1 : end of notification */
if (!xive2_router_end_es_notify(xrtr, end_blk, end_idx,
&end, END2_W1_ESn)) {
return;
}
}
/*
* Follows IVPE notification
*/
nvp_blk = xive_get_field32(END2_W6_VP_BLOCK, end.w6);
nvp_idx = xive_get_field32(END2_W6_VP_OFFSET, end.w6);
/* NVP cache lookup */
if (xive2_router_get_nvp(xrtr, nvp_blk, nvp_idx, &nvp)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: no NVP %x/%x\n",
nvp_blk, nvp_idx);
return;
}
if (!xive2_nvp_is_valid(&nvp)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: NVP %x/%x is invalid\n",
nvp_blk, nvp_idx);
return;
}
found = xive_presenter_notify(xrtr->xfb, format, nvp_blk, nvp_idx,
xive_get_field32(END2_W6_IGNORE, end.w7),
priority,
xive_get_field32(END2_W7_F1_LOG_SERVER_ID, end.w7));
/* TODO: Auto EOI. */
if (found) {
return;
}
/*
* If no matching NVP is dispatched on a HW thread :
* - specific VP: update the NVP structure if backlog is activated
* - logical server : forward request to IVPE (not supported)
*/
if (xive2_end_is_backlog(&end)) {
uint8_t ipb;
if (format == 1) {
qemu_log_mask(LOG_GUEST_ERROR,
"XIVE: END %x/%x invalid config: F1 & backlog\n",
end_blk, end_idx);
return;
}
/*
* Record the IPB in the associated NVP structure for later
* use. The presenter will resend the interrupt when the vCPU
* is dispatched again on a HW thread.
*/
ipb = xive_get_field32(NVP2_W2_IPB, nvp.w2) |
xive_priority_to_ipb(priority);
nvp.w2 = xive_set_field32(NVP2_W2_IPB, nvp.w2, ipb);
xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, &nvp, 2);
/*
* On HW, follows a "Broadcast Backlog" to IVPEs
*/
}
do_escalation:
/*
* If activated, escalate notification using the ESe PQ bits and
* the EAS in w4-5
*/
if (!xive2_end_is_escalate(&end)) {
return;
}
/*
* Check the END ESe (Event State Buffer for escalation) for even
* futher coalescing in the Router
*/
if (!xive2_end_is_uncond_escalation(&end)) {
/* ESe[Q]=1 : end of escalation notification */
if (!xive2_router_end_es_notify(xrtr, end_blk, end_idx,
&end, END2_W1_ESe)) {
return;
}
}
/*
* The END trigger becomes an Escalation trigger
*/
xive2_router_end_notify(xrtr,
xive_get_field32(END2_W4_END_BLOCK, end.w4),
xive_get_field32(END2_W4_ESC_END_INDEX, end.w4),
xive_get_field32(END2_W5_ESC_END_DATA, end.w5));
}
void xive2_router_notify(XiveNotifier *xn, uint32_t lisn, bool pq_checked)
{
Xive2Router *xrtr = XIVE2_ROUTER(xn);
uint8_t eas_blk = XIVE_EAS_BLOCK(lisn);
uint32_t eas_idx = XIVE_EAS_INDEX(lisn);
Xive2Eas eas;
/* EAS cache lookup */
if (xive2_router_get_eas(xrtr, eas_blk, eas_idx, &eas)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN %x\n", lisn);
return;
}
if (!pq_checked) {
bool notify;
uint8_t pq;
/* PQ cache lookup */
if (xive2_router_get_pq(xrtr, eas_blk, eas_idx, &pq)) {
/* Set FIR */
g_assert_not_reached();
}
notify = xive_esb_trigger(&pq);
if (xive2_router_set_pq(xrtr, eas_blk, eas_idx, &pq)) {
/* Set FIR */
g_assert_not_reached();
}
if (!notify) {
return;
}
}
if (!xive2_eas_is_valid(&eas)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN %x\n", lisn);
return;
}
if (xive2_eas_is_masked(&eas)) {
/* Notification completed */
return;
}
/*
* The event trigger becomes an END trigger
*/
xive2_router_end_notify(xrtr,
xive_get_field64(EAS2_END_BLOCK, eas.w),
xive_get_field64(EAS2_END_INDEX, eas.w),
xive_get_field64(EAS2_END_DATA, eas.w));
}
static Property xive2_router_properties[] = {
DEFINE_PROP_LINK("xive-fabric", Xive2Router, xfb,
TYPE_XIVE_FABRIC, XiveFabric *),
DEFINE_PROP_END_OF_LIST(),
};
static void xive2_router_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
XiveNotifierClass *xnc = XIVE_NOTIFIER_CLASS(klass);
dc->desc = "XIVE2 Router Engine";
device_class_set_props(dc, xive2_router_properties);
/* Parent is SysBusDeviceClass. No need to call its realize hook */
dc->realize = xive2_router_realize;
xnc->notify = xive2_router_notify;
}
static const TypeInfo xive2_router_info = {
.name = TYPE_XIVE2_ROUTER,
.parent = TYPE_SYS_BUS_DEVICE,
.abstract = true,
.instance_size = sizeof(Xive2Router),
.class_size = sizeof(Xive2RouterClass),
.class_init = xive2_router_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_XIVE_NOTIFIER },
{ TYPE_XIVE_PRESENTER },
{ }
}
};
static inline bool addr_is_even(hwaddr addr, uint32_t shift)
{
return !((addr >> shift) & 1);
}
static uint64_t xive2_end_source_read(void *opaque, hwaddr addr, unsigned size)
{
Xive2EndSource *xsrc = XIVE2_END_SOURCE(opaque);
uint32_t offset = addr & 0xFFF;
uint8_t end_blk;
uint32_t end_idx;
Xive2End end;
uint32_t end_esmask;
uint8_t pq;
uint64_t ret;
/*
* The block id should be deduced from the load address on the END
* ESB MMIO but our model only supports a single block per XIVE chip.
*/
end_blk = xive2_router_get_block_id(xsrc->xrtr);
end_idx = addr >> (xsrc->esb_shift + 1);
if (xive2_router_get_end(xsrc->xrtr, end_blk, end_idx, &end)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk,
end_idx);
return -1;
}
if (!xive2_end_is_valid(&end)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x is invalid\n",
end_blk, end_idx);
return -1;
}
end_esmask = addr_is_even(addr, xsrc->esb_shift) ? END2_W1_ESn :
END2_W1_ESe;
pq = xive_get_field32(end_esmask, end.w1);
switch (offset) {
case XIVE_ESB_LOAD_EOI ... XIVE_ESB_LOAD_EOI + 0x7FF:
ret = xive_esb_eoi(&pq);
/* Forward the source event notification for routing ?? */
break;
case XIVE_ESB_GET ... XIVE_ESB_GET + 0x3FF:
ret = pq;
break;
case XIVE_ESB_SET_PQ_00 ... XIVE_ESB_SET_PQ_00 + 0x0FF:
case XIVE_ESB_SET_PQ_01 ... XIVE_ESB_SET_PQ_01 + 0x0FF:
case XIVE_ESB_SET_PQ_10 ... XIVE_ESB_SET_PQ_10 + 0x0FF:
case XIVE_ESB_SET_PQ_11 ... XIVE_ESB_SET_PQ_11 + 0x0FF:
ret = xive_esb_set(&pq, (offset >> 8) & 0x3);
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid END ESB load addr %d\n",
offset);
return -1;
}
if (pq != xive_get_field32(end_esmask, end.w1)) {
end.w1 = xive_set_field32(end_esmask, end.w1, pq);
xive2_router_write_end(xsrc->xrtr, end_blk, end_idx, &end, 1);
}
return ret;
}
static void xive2_end_source_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
Xive2EndSource *xsrc = XIVE2_END_SOURCE(opaque);
uint32_t offset = addr & 0xFFF;
uint8_t end_blk;
uint32_t end_idx;
Xive2End end;
uint32_t end_esmask;
uint8_t pq;
bool notify = false;
/*
* The block id should be deduced from the load address on the END
* ESB MMIO but our model only supports a single block per XIVE chip.
*/
end_blk = xive2_router_get_block_id(xsrc->xrtr);
end_idx = addr >> (xsrc->esb_shift + 1);
if (xive2_router_get_end(xsrc->xrtr, end_blk, end_idx, &end)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk,
end_idx);
return;
}
if (!xive2_end_is_valid(&end)) {
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x is invalid\n",
end_blk, end_idx);
return;
}
end_esmask = addr_is_even(addr, xsrc->esb_shift) ? END2_W1_ESn :
END2_W1_ESe;
pq = xive_get_field32(end_esmask, end.w1);
switch (offset) {
case 0 ... 0x3FF:
notify = xive_esb_trigger(&pq);
break;
case XIVE_ESB_STORE_EOI ... XIVE_ESB_STORE_EOI + 0x3FF:
/* TODO: can we check StoreEOI availability from the router ? */
notify = xive_esb_eoi(&pq);
break;
case XIVE_ESB_INJECT ... XIVE_ESB_INJECT + 0x3FF:
if (end_esmask == END2_W1_ESe) {
qemu_log_mask(LOG_GUEST_ERROR,
"XIVE: END %x/%x can not EQ inject on ESe\n",
end_blk, end_idx);
return;
}
notify = true;
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid END ESB write addr %d\n",
offset);
return;
}
if (pq != xive_get_field32(end_esmask, end.w1)) {
end.w1 = xive_set_field32(end_esmask, end.w1, pq);
xive2_router_write_end(xsrc->xrtr, end_blk, end_idx, &end, 1);
}
/* TODO: Forward the source event notification for routing */
if (notify) {
;
}
}
static const MemoryRegionOps xive2_end_source_ops = {
.read = xive2_end_source_read,
.write = xive2_end_source_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 8,
.max_access_size = 8,
},
.impl = {
.min_access_size = 8,
.max_access_size = 8,
},
};
static void xive2_end_source_realize(DeviceState *dev, Error **errp)
{
Xive2EndSource *xsrc = XIVE2_END_SOURCE(dev);
assert(xsrc->xrtr);
if (!xsrc->nr_ends) {
error_setg(errp, "Number of interrupt needs to be greater than 0");
return;
}
if (xsrc->esb_shift != XIVE_ESB_4K &&
xsrc->esb_shift != XIVE_ESB_64K) {
error_setg(errp, "Invalid ESB shift setting");
return;
}
/*
* Each END is assigned an even/odd pair of MMIO pages, the even page
* manages the ESn field while the odd page manages the ESe field.
*/
memory_region_init_io(&xsrc->esb_mmio, OBJECT(xsrc),
&xive2_end_source_ops, xsrc, "xive.end",
(1ull << (xsrc->esb_shift + 1)) * xsrc->nr_ends);
}
static Property xive2_end_source_properties[] = {
DEFINE_PROP_UINT32("nr-ends", Xive2EndSource, nr_ends, 0),
DEFINE_PROP_UINT32("shift", Xive2EndSource, esb_shift, XIVE_ESB_64K),
DEFINE_PROP_LINK("xive", Xive2EndSource, xrtr, TYPE_XIVE2_ROUTER,
Xive2Router *),
DEFINE_PROP_END_OF_LIST(),
};
static void xive2_end_source_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->desc = "XIVE END Source";
device_class_set_props(dc, xive2_end_source_properties);
dc->realize = xive2_end_source_realize;
}
static const TypeInfo xive2_end_source_info = {
.name = TYPE_XIVE2_END_SOURCE,
.parent = TYPE_DEVICE,
.instance_size = sizeof(Xive2EndSource),
.class_init = xive2_end_source_class_init,
};
static void xive2_register_types(void)
{
type_register_static(&xive2_router_info);
type_register_static(&xive2_end_source_info);
}
type_init(xive2_register_types)
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